Lighting fixture



Sept. 9 1924. 1,507,758

T. SCOTT LIGHTING FIXTURE Filed June 6, 1921 Patented Sept. 9, 1924s UNITED STATES PATENT OFFFICE.

THOMAS sooner, or CLEVELAND, OHIO. j j- LIGHTING r x'ronn.

Application filedJ'une 6, 1921. Serial No. 475,203;

ToaZZ whom it may concern: i

Be it known that I, 'THoMAs Soorr, a.

citizen ofthe United States, residing at Cleveland, in "the county of Cuyahoga and State of Ohio, have invented a'certain new and useful Improvement in Lighting Fixtures, of which the following is a full, clear, and exact description, reference being had to theaccompanying drawings.

This invention relates to improvements n lighting fixtures and has to' do more particularly withmeans for suspending a fixture from a ceiling, wall, or other supporting surface;

The objects of the invention are to projects, and which affords an easy method of insulating the fixture from the supporting structure. f;

Such a construction is illustrated in the accompanying drawing which forms a part hereof and wherein Fig. 1 is a side elevation of an electric lighting fixture embodying my invention; Fig. 2 is a vertical section through the canopy showing it attached to the supporting plate or base, the latter being shown in elevation to the right of its central portion, and as insulated from a metal ceiling and conduit; Fig. 3 is a perspective view showing the canopy detached from the supporting plate or base, in the present instance the plate or base being shown as though supported by and insulated from the ears of an outlet box; and Fig. 4 is a sectional detail on the line 44 of Fig. 2.

The supporting plate or base is designated 1, and in the present embodiment it is composed of an annular rim that is connected, through slotted radial arms 2 and 3, with a central ring 4t, the arms 2 being provided vwith slots wide enough to accommodate insulating bushingsQ through which attaching means 5, such as screws, pass for connecting the base to the ears of an. outlet box 6 (Fig. 3). When the base isto be attached to laths of a wall or ceiling, the attaching means maybe passed directly through thenarrower slots of arms 3 inasmuch as no lnsulation is necessary- The a slots in arms 2 and 3'enable the attaching means to be; adjusted to adapt their spacing to the spacing ofthe laths, or to the spacing of the ears in different sizes of outlet boxes, etc.

Lugs 8 projectra-dially from the periphery of the base adjacent its lower side (as-* suming the base is in the position shown in the drawing), and the upper faces of the lugs are inclined outwardly and downwardly on each side of their radial centers for a purpose which I shall presently explain.

A shell, commonly called acanopy and rdesignated 10, has an inwardly directed flange 11 at its upper end which is adapted to be engaged over the lugs 8, the flange being provided with notches 12 through which the lugs are passe-d when applying the canopy to the base. In the present construction I have shown spaced about the periphery of the base, and a corresponding number of notches likewise spaced about "the flange of thecanopy. After applying the canopy to the base as three lugs equally .7

just described with the lugs 8 passed through the notches 12, the canopy is turned to the right (according to the present arrangement) until shallow V-shaped depressions 13 of the flange ride over the roofshaped upper surfaces of the lugs 8, the depressions, and tongues 14 that are turned down from flange 11 adiacent the notches 12, cooperating with the lugs in such manner as to prevent accidental turning of the canopy with respect to the base. In disconnecting the canopy from the base, the former is turned in a left hand direction until the lugs 8 register with the notches 1 2, and such position is indicated when the lugs 8 engage the tongues 14;. The inclined or Y roof-shaped upper faces of the lugs 8 and the V-shape of the depressions 13 facilitate the passage of the depressions over the lugs.

The lamp supporting portion of the fixture, such portion being designated 15 inv Fig. 1, is suspended from the canopy 10 by means of a chain 16 that has connection atits upper end with an eye 17 {having a tubular shank 18 that is passed through a hole in the lower end of the canopy and is threaded at its inner end'fortheapplication of a nut 19. The wires 20 of the fixture extend into the canopy through the tubular shank 18 of the eye 17, and within the canopy have connection with the leading-in wires 21.

It wi'll'be seen frorntihe foregoing description that the construction "provide'dby my invention greatly facilitates the installation of the fixture. "The base 1 is first attached to thesupporting srrrface; the wires 20 are properly connected to thew-ires 21 and the canop carrying the fixture assembly, is

applied to the base in-the manner above described. '"The electriciannnay make the connections and hang the fixture complete, and when the inspector" follows to approve the work, he may disconnect the canopy from thebase, inspect the connections, and return the fixture to its place, all Without the use of tools, and making it unnecessary for the workmen to returnto the job, as is the case in hanging fixtures of prevailing co nstruc-tions. Moreover, the methods of insulating the base 1, and consequently the fixturejfroin the supporting structure are very simple. I'have already explained: how the base is insulated from the outlet box through the bushings 2 (Fig. 8). In 2 the base is shownas though mounted on a metal ceiling with a dislrQiZ of insulating material interposed between the base and ceiling and an insulating bushing 23 is set into the ring 4 and over the end of the pipe or conduit 24 through which the leading-in wires 21 pass. A nut 25 is applied to the threaded 'end of the pipe or conduit and supports the base. The disk 22 extends beyond the periphery of the base and prevents contact of the canopy with the ceiling.

Having thus described my invention, what I claim is:

1. In combination, a base, and a lighting fixture assembly incorporating a canopy for application to the base, the base being provided with lugs, and the canopy having flange parts that are spaced apart endwiser so that the flange parts may be passed over and engaged with the lugs, the flange being provided wi-th'depressions for cooperation with the lugs to resist rotation of said canopy on said base, and means for indicating when the spaces between the flange parts are in register with the @lugs.

21in co1nbination,a base having radiating lugs, and a lighting fixture assembly ineorpe-rating a canopy "having an inwardly directed flange, at one end, the flange being provided with notches corresponding in position with the lugs of the base so that the-flange may be placed over the lugs and the canopy turned to engage the flange with the lugs," the flange being provided with depressions for cooperation with the lugs to resist rotation of said canopy on said base,

the surface of the lugs Wherewith the flange 'of the base, and depressions formed in said flange and cooperating with said lugs to resist rotation of said canopy on said base. In testimony whereof, I hereunto affix'my signature.

THOMAS, SCOTT. 

